Type-writer attachment.



F. H. ALDER.

TYPE WRITER ATTACHMENT.

APPLICATION FILED SEPT. 30, 1912.

1,080,506. Patented Dec. 2, 1913.

Fig.1.

fl By fiwmmm Attorney FREDERICK HENRY ALDER, 0F ZURICH, SWITZERLAND.

TYPE-WRITER ATTACHMENT.

To all whom it may concern:

Be it known that I, FREDERICK I'IENRY Amen, architect, citizen of the Swiss Itepublic, residing at 1 Metropol, Zurich, Switzerland, have invented certain new and useful Improvements in TypeWVriter Attachments, of which the following is a specilication.

This invention refers to a device for op erating the carriage of typewriters and at the same time spacing the lines by means of a system of levers connected to the line spacing lever of the typewriter, which system of levers can be operated by a treadle or by means of the knee. In the known devices serving the same purpose the parts for operating the carriage for example lever, rods and the like) are fastened either to the type writing table or to the typewriter itself. In one form of construction of the known devices the typewriter must be immovably fastened to the table of the typewriter as the device cannot accompany accidental displacements of the machine. As the typewriting machine must be moved both when writing as well as when cleaning the same its fastening to the table is not always pcrmissibio and consequently a reliable working of such devices cannot always be attained, because if the typewriter is not absolutely exactly adjusted with respect to the operating device the carriage will not be able to reach the one end position owing to its being coupled up to the device. In order to overcome this disadvantage it has been proposed to mount the device on the typewriter itself but this necessitated constructive modifications of the typewriter and furthermore a specially constructed device would be necessary for almost every one of the numerous kinds of typewriters.

The present invention consists in that the lei'er serving for moving back the carriage and connected on the one hand to a treadle or knee gear and on the other hand to the line space lever of the typewriter is mounted on a special support which is held in position by the weight of the typewriter and which follows all the accidental displacements of the typewriter on the table, so that once the device has been adjusted it will continue to work correctly whether the machine is moved or not. As compared with the known devices the present device has furthermore the advantage that it does not necessitate any constructive modifications Specification of Letters Patent.

Application filed September 30, 1912.

Patented Dec. 2, 1913. Serial No. 723,246.

either of the table or of the typewriter, can be fitted by any inexperienced person and can be used with any typewriter machine and any table.

One form of construction is shown for the sake of example in the accompanyingdrawing as mounted on a machine, and in which:-

Figure 1 is a back view. Fig. 2 is a side view.

The device consists of a metal f'ame l situated on the table and serving as baseplate for the typewriter. India rubber washers or other like flexible material. are provided on the lower surface of the frame 1, whereas on its upper surface felt pads 2 are provided, on which latter the typewriter rests. On one side the frame 1 is provided with bearings 3 and l in which a shaft 5 is mounted. A socket (5 in which a lever 7 is screwed is mounted on the shaft 5. The lever 7 is detachably connected to the line space lever 9 of the typewriter by a link 8. By turning the shaft 5 the lever 7 is caused to move back the carriage of the typewriter into its initial position (shown in dotted lines in Fig. 1). In order to effect this without the assistance of the hands the end of the shaft 5 remote from the bearing 3 is bent at right angles and is provided with a hook from which a chain 10 is suspended, the latter at its lower end being fastened to a rod 11. The rod 11 is pivotally connected to a rod 19, which is fastened to the treadle 13 resting on a supporting shaft 14- adjustably n'iounted on the table of the typewriter. The chain 10 permits of exactly adjusting the distance from the treadle to the shaft By unscrewing the lever 7 the socket 6 can be moved along the shaft 5 and can be fastened in any desired position by tightening up the lever, so that the position of the lever 7 on the shaft 5 can be adjusted correspondingly to the line space lever of the typewriter.

As the typewriter rests on the frame 1 of the device, the latter is so connected to the typewriter that it follows all displacements of the same and can work correctly in any position of the machine.

The frame can also be formed as a massive base-plate which would then be placed between felt sheets beneath the typewriter. Instead of the treadle 13 for operating the lever 7, a lever situated within reach of the knee may be employed. By arranging the link 8 instead of the known flexible part between the line space lever 9 and the lever 7 the device can be used for typewriters with line space lever arranged on the left as well as also on the right hand side of the machine inasmuch as the carriage can be pushed just as well as pulled by the rod 8.

What I claim and desire to secure by Letters Patent is A device for. operating carriages of type writers and simultaneously line spacing, a base on which the typewriter may rest having bearings formed therewith, a shaft mounted in the bearings, and having an end portion extending at an angle to the main portion of the shaft, a member connected to the angular end of the shaft for oscillating the angular end of the shaft, a lever, means for securing the lever to the shaft, a link adapted for connection with either end of a carriage of a typewriter whereby the carriage may be pulled or pushed, and means for adjustably connecting the link to the lever whereby the throw of the shaft may be made coextensive with the distance of travel of a carriage of a typewriter.

In testimony whereof I have affixed my signature, in presence of two witnesses.

F. HENRY ALDER. lVitnesses:

CARL GUBLER, KARL WIELAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

